流体机械

2018, v.46;No.554(08) 49-55

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旋涡泵内纵向旋涡影响机理分析
Analysis of the Longitudinal Vortex Effect Mechanism in Vortex Pump

陶佳欣;陈万强;李祥阳;
TAO Jia-xin;CHEN Wan-qiang;LI Xiang-yang;Pump Equipment Research Center of Xi'an Aeronautical University;

摘要(Abstract):

为进一步研究旋涡泵内部流场特点,阐述旋涡内纵向旋涡对旋涡泵外特性的影响机理,本文通过试验测得某旋涡泵的流量-扬程特性曲线,并与数值计算结果相对比,验证SST k-ω湍流模型应用于旋涡泵数值计算中的准确性;通过分析6个轴向截面和15个周向截面的流场特征,研究纵向旋涡的形成和消失与压力速度变化的联系。结果表明:旋涡泵内可分为进口区、加速区、线性区、减速区、出口区和隔舌区;旋涡泵叶轮与流道的动量交换不仅仅发生在叶根和叶尖区域;线性区内纵向旋涡周期性的产生与消失使流体压力升高了总压升的85.7%;出口区和隔舌区内纵向旋涡的消失使进口区压力突降了35%,隔舌区速度突降了60%。
In order to further study the characteristics of internal flow field of vortex pump,the influence mechanism of longitudinal vortex in the vortex pump on external characteristics of the pump was described. This paper compared the mass flow —head characteristic curve of a vortex pump measured through test with the numerical simulation results,and proved accuracy of application of SST k-ω turbulence model in numerical simulation of the vortex pump. Through the analysis of characteristics of 6 axial sections and 15 circumferential sections of the flow field in the vortex pump,the relationship between vertical vortex formation and disappearance and changes in pressure and velocity.The results show that the space in the vortex pump can be divided into the inlet zone,acceleration zone,linear zone,deceleration zone,exit zone and cut-water zone;Momentum exchange between the impeller and the flow passage not merely occurred in the blade root and blade tip area; Periodic generation and disappearance of longitudinal vortexes in the linear zone made the fluid pressure increased by 85.7% of the total pressure rise;And disappearance of the longitudinal vortexes in exit zone and cut-water zone made the pressure in the inlet zone suddenly reduced by 35%,and made the velocity in cut-water zone reduced by 60%.

关键词(KeyWords): 旋涡泵;数值计算;纵向旋涡
vortex pump;numerical simulation;longitudinal vortex

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51575420);; 陕西省自然科学基础研究计划项目(2014JM2-5069);; 陕西省教育厅服务地方专项计划项目(14JF011);; 西安市科技计划项目(CXY1518(2));; 西安航空学院校级科研基金项目(2017KY1220)

作者(Authors): 陶佳欣;陈万强;李祥阳;
TAO Jia-xin;CHEN Wan-qiang;LI Xiang-yang;Pump Equipment Research Center of Xi'an Aeronautical University;

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